Oxygen cycle (modified).
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Oxygen is a colorless, odorless gas essential for respiration in humans and animals and plays a crucial role in decomposition and aquatic life. Discovered by Carl Wilhelm Scheele in 1772, oxygen composes approximately 21% of the atmosphere and is involved in oxidation reactions. It is produced through processes like photosynthesis and is found in the biosphere, atmosphere, and lithosphere.
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Oxygen cycle (modified).
- 2. UMER FAROOQ. ANUM AJMAL . MISBAH SADIQ. NOMAN HAFEEZ. 2
- 4. Is the colourless , odourless and tasteless gas. Oxidation – it is the process of uniting or of causing a substance to unite with the oxygen.
- 5. Carl Wilhelm Schele – a Swedish chemist who discovered oxygen for the first time in 1772.
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- 7. Humans need it to breathe. Needed for decomposition of organic waste. Water can dissolve oxygen and it is this dissolved oxygen that supports aquatic life.
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- 13. The east’s atmosphere consists of 21% oxygen The earth’s lithosphere consists of 99.5% oxygen The earth’s hydrosphere consists of 46.60% oxygen. The earth’s biosphere consists of 0.01% oxygen.
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- 23. Name-oxygen Symbol-O Atomic no.-8 Uses-for oxidation reactions for the respiration for the respiratory function of humans, animals, plant, some types of bacteria e.tc. Sources- photolysis, photosynthesis. Reservoir-biosphere, atmosphere, lithosphere.